FHWA-Central Federal Lands Highway Division
Denver,
Colorado
View Accreditation Certificate
Patrick
Kowing
1 Denver Federal Center
Building 52
Central Fed. Lands Highway Div. Lab
Denver
,
Colorado
80225
Phone: (720) 963-3538
Fax:
patrick.kowing@dot.gov
Quality Management System - accredited since 3/1/1989
R18, ISO/IEC 17025, C1077 (Aggregate), C1077 (Concrete), D3666 (Aggregate), D3666 (Asphalt Binder), D3666 (Asphalt Mixture), D3666 (Emulsified Asphalt), E329 (Aggregate), E329 (Asphalt Binder), E329 (Asphalt Mixture), E329 (Concrete), E329 (Emulsified Asphalt)
Asphalt Binder - accredited since 3/1/1989
R28, T50, T51, T228, T240, T301, T313, T315, T316, T350, D70, D113, D139, D2872, D4402, D6084, D6648, D7175, D7405
Emulsified Asphalt - accredited since 3/1/1989
T59 / D6930 (Settlement and Storage Stability)
T59 / D6933 (Sieve Test)
T59 / D6934 (Residue by Evaporation)
T59 / D6935 (Cement Mixing)
T59 / D6998 (Aggregate Coating)
T59 / D7402 (Particle Charge)
T59 / D7496 (Saybolt Viscosity at 25°C (77°F))
T59 / D7496 (Saybolt Viscosity at 50°C (122°F))
Asphalt Mixture - accredited since 3/1/1989
R30, R35, R47, T30, T166, T167, T209, T246, T247, T269, T283, T305, T308, T312, T329, T331, D1074, D1075, D1560 (Stability), D1561, D2041, D2726, D3203, D4867, D5444, D6307, D6390, D6752, D6925, D6931
Soil - accredited since 3/1/1989
R58, R74, T89, T90, T99, T100, T180, T190, T265, T267, T288, T289, T311, D421, D698, D854, D1140, D1557, D2216, D2487, D2488, D2844, D2974, D4318, D4643, D4972
Aggregate - accredited since 3/1/1989
R76, R90, T11, T19, T21, T27, T37, T84, T85, T96, T100 (Mineral Filler), T104, T112, T176, T255, T304, T335, C29, C40, C88, C117, C127, C128, C131, C136, C142, C535, C566, C702, C1252, D75, D546, D2419, D4791, D5821
Concrete - accredited since 3/1/1989
M201, R39, R60, T22, T23 (Cylinders), T24, T119, T121, T152, T196, T231 (7000 psi and below), T303, T309, C31 (Cylinders), C39, C42, C138, C143, C172, C173, C192, C231, C511, C597, C617 (7000 psi and below), C805, C1064, C1231 (7000 psi and below), C1260, C1542, C1567
Please note that our accreditations do not include an expiration date. An accreditation only expires when the laboratory fails to comply with our accreditation requirements.
* This information is only valid as of 1/19/2021. Please visit http://www.aashtoresource.org for current accreditation status.
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